Nuclear quadrupole resonance spectroscopy with a femtotesla diamond magnetometer
Nuclear quadrupole resonance spectroscopy with a femtotesla diamond magnetometer
Radio frequency (RF) magnetometers based on nitrogen vacancy centers in diamond are predicted to offer femtotesla sensitivity, but previous experiments were limited to the picotesla level. We demonstrate a femtotesla RF magnetometer using a diamond membrane inserted between ferrite flux concentrators. The device provides ~300-fold amplitude enhancement for RF magnetic …